Parallel Execution Requirement

This rule applies to files matching the patterns above.

# Parallel Execution Requirement

## Rule
All independent commands within a hook stage MUST use `parallel: true`. Sequential execution of independent checks is prohibited — it wastes developer time.

## Format
```yaml
# Good — parallel execution
pre-commit:
  parallel: true
  commands:
    lint:
      glob: "*.{ts,tsx}"
      run: npx eslint {staged_files}
    format:
      glob: "*.{ts,tsx,json}"
      run: npx prettier --check {staged_files}
    secrets:
      run: gitleaks protect --staged
```

```yaml
# Bad — sequential (3x slower)
pre-commit:
  commands:
    lint:
      run: npx eslint {staged_files}
    format:
      run: npx prettier --check {staged_files}
    secrets:
      run: gitleaks protect --staged
```

## When Sequential IS Appropriate
```yaml
# Format then lint — lint depends on formatting
pre-commit:
  piped: true
  commands:
    format:
      glob: "*.{ts,tsx}"
      run: npx prettier --write {staged_files}
    lint:
      glob: "*.{ts,tsx}"
      run: npx eslint {staged_files}
```

## Performance Targets
| Hook Stage | Target Time | Max Time |
|------------|------------|----------|
| pre-commit | < 5 seconds | 10 seconds |
| commit-msg | < 1 second | 3 seconds |
| pre-push | < 30 seconds | 60 seconds |

## Anti-Patterns
- Sequential execution of independent lint, format, and security checks
- Missing `parallel: true` on hook stages with 2+ commands
- Pre-commit hooks exceeding 10 seconds (developers will skip)
- Running tests in pre-commit instead of pre-push